Transition metal composite catalyst for purifying fire coal organic exhaust gas and preparation method and application of transition metal composite catalyst

A composite catalyst and transition metal technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of complex composition and high dust content of coal-fired flue gas , large flue gas volume and other issues, to achieve excellent activity and high COx selectivity, high oxidation performance, wide temperature window effect

Active Publication Date: 2019-12-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, research on organic pollutants at home and abroad mainly focuses on industrial source emissions, indoor organic pollutants, etc. Coal-fired flue gas has complex components, large flue gas volume, high dust content, SO2, NOx and NH 3 The content of such is high, and it is impossible to directly apply the existing industrial sources of catalytic oxidation catalysts, and it is urgent to develop new materials for catalytic oxidation of organic pollutants in coal-fired flue gas

Method used

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  • Transition metal composite catalyst for purifying fire coal organic exhaust gas and preparation method and application of transition metal composite catalyst
  • Transition metal composite catalyst for purifying fire coal organic exhaust gas and preparation method and application of transition metal composite catalyst
  • Transition metal composite catalyst for purifying fire coal organic exhaust gas and preparation method and application of transition metal composite catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] CuOx-V 2 o 5 -WO 3 / TiO 2 Preparation of:

[0039] (1) Dissolution of V and W precursors:

[0040] Add 0.0458 g of the V precursor ammonium metavanadate and 0.1654 g of the W precursor ammonium tungstate into 20 mL of deionized water and mix thoroughly, then place them in a collector-type constant temperature magnetic stirrer and stir for 30 minutes to dissolve them. Add 0.8 g of oxalic acid precursor under stirring state, continue to stir vigorously at constant temperature after ultrasonication for 60 min, and prepare a mixed precursor solution.

[0041] (2) Dissolution of Cu precursor:

[0042] 0.54 g of copper nitrate was added under stirring, and after ultrasonication, constant temperature and strong stirring was continued for 30 min to prepare a mixed precursor solution.

[0043] (3) TiO 2 pre-processing:

[0044] TiO will be used as catalyst support 2 Take out after drying in a vacuum oven, cool to room temperature for use; the TiO 2 The mass is 2 g.

[0...

Embodiment 2

[0049] CuOx-V 2 o 5 -MoO 3 / TiO 2 Catalyst preparation:

[0050] (1) Dissolution of V and Mo precursors:

[0051] Add 0.0458 g of the V precursor ammonium metavanadate and 0.1654 g of the Mo precursor ammonium molybdate into 20 mL of deionized water and mix them thoroughly, then place them in a collector-type constant temperature magnetic stirrer and stir them for 30 minutes to dissolve them. Add 0.8 g of oxalic acid precursor under stirring state, continue to stir vigorously at constant temperature after ultrasonication for 60 min, and prepare a mixed precursor solution.

[0052] (2) Dissolution of Cu precursor:

[0053] 0.54 g of copper nitrate was added under stirring, and after ultrasonication, constant temperature and strong stirring was continued for 30 min to prepare a mixed precursor solution.

[0054] (3) TiO 2 pre-processing:

[0055] TiO will be used as catalyst support 2 Take out after drying in a vacuum oven, cool to room temperature for use; the TiO 2 T...

Embodiment 3

[0059] CoOx-V 2 o 5 -WO 3 / TiO 2 Preparation of:

[0060] (1) Dissolution of V and W precursors:

[0061] Add 0.0458 g of V precursor ammonium metavanadate and 0.1654 gW precursor ammonium tungstate into 20 mL of deionized water and mix thoroughly, place in a heat-collecting constant temperature magnetic stirrer and stir for 30 minutes to dissolve, then stir Add 0.8g of oxalic acid precursor under the state, continue to stir vigorously at constant temperature after ultrasonication for 60min, and prepare a mixed precursor solution.

[0062] (2) Dissolution of Co precursor:

[0063] Add 0.50 g of cobalt nitrate under stirring state, continue to stir vigorously at constant temperature for 30 min after ultrasonication, and prepare a mixed precursor solution.

[0064] (3) TiO 2 pre-processing:

[0065] TiO will be used as catalyst support 2 Take out after drying in a vacuum oven, cool to room temperature for use; the TiO 2 The mass is 2 g.

[0066] (4) CoOx-V 2 o 5 -WO...

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Abstract

The invention discloses a transition metal composite catalyst for purifying fire coal organic exhaust gas and a preparation method and application of the transition metal composite catalyst. The preparation method includes the steps that a Me precursor, a V precursor and an A precursor are dissolved in hot water, and loaded on TiO2 after oxalic acid is added, and the transition metal composite catalyst for purifying the fire coal organic exhaust gas the is obtained, wherein the Me precursor is a transition metal precursor, the V precursor is ammonium metavanadate, and the A precursor is a tungsten or molybdenum precursor. The defects that an existing catalyst for purifying organic matter is narrow in temperature window, low in activity, low in COx selectivity and low in oxidation efficiency in flue gas containing sulfur, nitrogen and ammonia are overcome, and the excellent oxidation performance to the fire coal organic exhaust gas the is achieved. The prepared catalyst can be widely applied to the fields of air pollution control of the fire coal flue gas, the organic matter exhaust gas containing the sulfur, the nitrogen and the ammonia and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and specifically relates to a preparation method of a transition metal composite catalyst for purifying coal-burning organic waste gas and its catalytic oxidation of organic matter in coal-burning flue gas and sulfur-containing, nitrogen-containing, and ammonia-containing waste gases, etc. Application in air pollution control. Background technique [0002] The organic pollutants produced in the coal combustion process have a low emission concentration, but their components are complex, the total amount is large, and their toxicity is high, posing a major threat to the ecological environment. According to different treatment methods, organic pollutant control technologies can be divided into two categories: recovery technology and destruction technology, which are applied to different occasions. For high-concentration or relatively expensive ones with recycling value, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J23/888B01D53/86B01D53/48B01D53/54B01D53/62
CPCB01J23/002B01J23/888B01J23/8877B01D53/8603B01D53/8621B01D53/864B01D2257/502B01D2257/306B01J2523/00B01J2523/17B01J2523/47B01J2523/55B01J2523/68B01J2523/69B01J2523/845
Inventor 胡芸肖高飞李剑晗郭梓洋王俊程源璟熊涛刘雨奇付名利
Owner SOUTH CHINA UNIV OF TECH
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